Screen for



- 2 SheetsSheet 1. D. LANDIS.

Miil Bolt.

No; 30,483. Patented Oct. 23, I860.

2 Sheets-Sheet 2. D. LAN'DIS.

- Mill Bolt.

No. 30,483, Patented Oct. 23,1860.

Inventor: I

Witnesses N PETERS. Pmmuma n mr. Washington. ac.

UNITED STATES PATENT OFFICE.

DAVID LANDIS, OF LANCASTER, PENNSYLVANIA.

SCREEN FOR FLOUR-BOLTS.

Specification forming part of Letters Patent No. 30,488, dated October23, 1860; Reissued August 19, 1862, No. 1,328.

To all whom it may concern:

Be it known that I, DAVID LANDIS, of Lancaster, in the county ofLancaster and State of Pennsylvania, have invented a new and ImprovedScreen Attachment to be Applied to Flour-Bolts for the Purpose ofPreventing the Entrance of Bugs Therein; and I do hereby declare thatthe following is a full, clear, and exact description of the same,reference being had to the annexed drawings, making a part of thisspecification, in which Figure 1, is a longitudinal vertical see- I tionof my invention taken in the line :0, 00,

Fig. 2. Fig. 2, a transverse vertical section of the same, taken in theline 2 3 Fig. 1.

Similar letters of reference indicate corresponding parts in the twofigures.

The object of this invention is to separate bugs from meal before thelatter enters the bolt and thereby prevent the destruction of thebolting cloth, the bugs soon destroying the cloth after entering thebolt.

The invention consists in the employment or use of a rotating screen andbox placed above the bolt chest and so arranged as to efiect the desiredend as hereinafter fully shown and described.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A, represents a bolt chest and B, the bolt fitted therein. This bolt iscovered with bolting cloth a, and is placed in an inclined positionwithin the chest the same as usual. These parts being constructed andarranged as usual do not require a minute description.

On the bolt chest A, there is placed a framing C, in which a cylinder D,is fitted and placed. This-cylinder is allowed to rotate freely in theframing G, and the outer part of the framing as shown at a, is rathersmaller in diameter than the other portion I), as shown clearly in Fig.1.

\Vithin the cylinder D, there is placed a cylindrical wire screen E.This screen is formed of wire cloth 0, stretched over a proper reel orframe (Z. The screen E, extends the whole length of the part b, of thecylinder D, and the outer end of the screen just fits within the smallerpart a, of the cylinder D, and the journals 6, of the screen E, form thejournals of the cylinder D, the screen being stationary within thecylinder.

Between the wire cloth 0, of the screen E, and the part b, of thecylinder D, there is a space 7, and the part B, of the cylinder at itsouter end or junction with part a, has holes 9, made in it. The outerpart of a, is also perforated by two or more holes h.

F, is a spout which leads into the cylinder D, the lower end of saidspout passing through a circular disk- 2', which forms a head or coverto the cylinder D. The cylinder D, and screen E, are slightly inclined,the depressed ends being over the spout G. The spout G, passes throughthe upper part of the chest A, and leads into the bolt B, said spoutbeing directly under the holes g, in the part b, of the cylinder H is abox which is attached to the chest A, and is directly under the holes h,in the part a, of the cylinder.

The operation is as follows. The meal, that is to say the flour and branas it comes from the stones passes into the spout F, which conducts itinto the screen E. The cylinder D, and bolt B, are rotated by anyconvenient power. The meal passes through the screen E, into the spacef, and down through the holes g, into the spout G, which conducts itinto the bolt B, while the bugs which cannot pass through the screen E,are discharged into the smaller part a, of the cylinder D, and pass outthrough the holes 72., into the box H.

Thus by this simple arrangement the bolt is preserved, the bugs beingentirely excluded from it.

I would remark that the bolt chest may be lined with metal a and metalend pieces b may also be employed to prevent the bolt being acted uponexternally by the bugs.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

The rotating cylinder D, and screen E, the latter being placed withinthe former and both arranged essentially as shown and in such relationwith the bolt to operate as and for the purpose set forth.

DAVID LANDIS.

Witnesses:

J. B. MECARTNEY, WM. B. WVILEY.

